Defensive publication



DEFENSIVE PUBLICATION UNITED STATES PATENT OFFICE Published at therequest of the applicant or owner in accordance with the Notice of Dec.16. 1969, 869 0.G. 687. The abstracts of Defensive Publicationapplications are identified by distinctly numbered series and arearranged chronologically. The heading of each abstract indicates thenumber of pages of specification, including claims and sheets ofdrawings contained in the application as originally filed. The files ofthese applications are available to the public for inspection andreproduction may be purchased for 30 cents a sheet.

Defensive Publication applications have not been examined as to themerits of alleged invention. The Patent Ofiice makes no assertion as tothe novelty of the disclosed subject matter.

PUBLISHED DECEMBER 16, 1969 869 O.Gr. 71 i T869,013 PROCESS FORPREPARING PHOTOGRAPHIC IMAGES WITH THALLIUM HALIDE EMULSIONS Peter JohnHillson, 66 Dukes Ave., Chiswick, London, England Filed July 29, 1969,Ser. No. 845,875 Int. Cl. G03c 1/72 US). C]. 96-48 No Drawing. 5 PagesSpecification A process is described for photodevelopment of emulsionsof thallous chlorobromide in a hydrophilic colloid, such as gelatin. Anelement comprising a coating of the emulsion is imagewise exposed to ahigh intensity flash of actinic radiation to form a latent image and isthen overall exposed to low intensity radiation to develop a visibleimage in the previously exposed areas. The thallous chlorobromidecoverage is typically about 0.005 mole per square foot.

